Xp uses Welcome/Login Screen where the Icons of users in the system are shown with the status of users, But administrator is not shown by default.
So u have to press Ctrl + Alt + Del and login using username administrator and correspondent password
What is need to do all these things. Instead just configure once and let it show administrator account on the welcome/login screen itself
  1. Open Registry Editor.
  2. HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts\UserList
  3. Create the following entry, Administrator: REG_DWORD
  4. Assign a value of 1.
  5. Close Registry Editor.
  6. Reboot.